class Fish{
	int weight =1;
}
class Lake {
	Fish fish;
	void setFish(Fish s){
		fish = s;
	}
	void foodFish(int m){
		fish.weight=fish.weight+m;
	}
}
public class E3_1{
	public static void main (String args[]){
		Fish redFish =new Fish();
		System.out.println(redFish.weight);
		Lake lake = new Lake();
		lake.setFish(redFish);
		lake.foodFish(120);
		System.out.println(redFish.weight);
		System.out.println(lake.fish.weight);
	}
}
